Asbestos insulating tape



y 1931. o. H. CILLEY 1,803,840

ASBESTOS INSULATING TAPE Filed Sept. 22, 1928 appear on the. surface ofthe fabric, and:

Patented May 5, 1931 UNITED STATES PATENT. OFFICE OS BORN H. CILLEY, OFMANHEIM, PENNSYLVANIA, ASSIGNOR TO UNITED STATES ASBESTOS (10., OFMANHEIM, PENNSYLVANIA, .A. CORPORATION OF PENNSYLVANIA ASBESTOSrivsumirme TAPE Application filed September 22,1928. Serial No. 307,632.I

. The principal object is to provide asbestos insulating material forcovering steam, vapor and hot water lines and in general for applicationfor; heat retentive purposes;

which material "shall be possessed of eater resistance to wear, greaterflexibili y and greater overall serviceability and efficiency than. thematerialsheretofore proposed or available.

The nature of the invention consists in providing padded asbestosinsulation embodying a woven tubular tape containing a pad or filling ofloose asbestos fibre and ultimately flattened for useythe weave being adiagonal twill, the twills on the respective faces of the flattened tubebeing reversely formed, that is to say the twill on one side runs upwardfrom left to right and on the other side the range is from right toleft; and the weave is'such that one side or face of the tape containshalf the amount of filling of the other side, for the purpose and withthe result of imparting such added flexibility as 'will enable the tapeto conform more readily to the ,curvature of the pipe when woundspirally around it than would -be the case with a tape of plain weave.

The invention is illustrated panying drawings, wherein Figure 1 is .an'elevational view of the improved covering tape.

Fig. 2 is a sectional view thereof.

I Fig. 3 is a diagram of one of the diagonal twills. According to myinvention I provide heat retentive or insulation material consisting bfwovenasbestos tape in the form of a flat tube 5 containing a pad orfilling 6 of loose asbestos fibre. l 40 The weave is a diagonal twill,the twill on one side of the tape running upwardvfrom leftto right, andon the otherside from right to left. This is best shown in the diagramFig. 3 wherein the black squares represent the points at which thefilling or weft would in the accomthe white squares represent points atwhich the war appears onthe face of the fabric.

The abric of the tube also-variesas to the to relative amount of fillingmaterial in'its respective facesithat is to say one face (the outer)contains double the amount of filling contained in the other. This isaccomplished by weaving, for one face, a two up and one down twill whichmeans that each pick of filling is under two warp ends and over one warpend, alternately when placed in the fabric; and by weaving for the otherface a one up and two down twill by which is understood that when thefilling is placed in the fabric it covers two warp ends and passes underone warp end alternately across the 1y to and is in full contact withthe surface of the pipe, and readily adapts itselfto joints and flanges.In short, the new article is so completely flexible that it eliminatesall tendency of buckling and ridge formingwhen wound or wrapped inservice. I

1Having thus described my invention, I c aim:

. '1. Materialfor covering pipes anPd the like,

consistin of flat tubular tape of woven fabric, each ace of the taperesenting a diagonal twill, and a pad for tile tape.

2. Material'for covering pipes andthe like, consisting of flat tubulartape of woven fabric, whereof one face contains less filling than theother in drder to impart flexibility and to prevent buckling, andwhereof the respective faces present twills extending in opositediagonal directions as viewed in each ace, and a pad for the tape. Y

3. Padded asbestos insulation comprising pad material and investing mateial consisting of woven asbestos in the form of tubular tape whereof onesection is formed as a tw hp and one down twilland whereof anothersection is formed as a one up and two down twill, whereby suflicientflexibilily is established to enable the tape to be effectively appliedin service without the hazardof back 4. Material tor'coverin-g pipes andthe like,

consisting of fiat tubular tape of woven asbestos fabric, each face ofthe tape presenting a diagonal twill, and a pad of loose asbestos fiberwithin the tape.

* 5. Material for covering pipes and the like, consisting of fiattubular tape woven with increased flexibility in one diagonal directionso as to permit the tape to conform to a cylinder when wrapped thereon,and a pad within the tape.

6. Material for covering pipes and thelike,

